How to implement auditing (CreatedAt, UpdatedAt, soft delete)?

Short answer: Use shadow properties or explicit properties for timestamps. Override SaveChanges() to set audit fields. Use global query filters for soft delete support.

Real-world example (ShopNest)

ShopNest’s order service uses EF Core to save an Order and its line items in one SaveChangesAsync() call inside a transaction.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.